diff options
Diffstat (limited to 'arch/mips/isa/decoder.isa')
| -rw-r--r-- | arch/mips/isa/decoder.isa | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/arch/mips/isa/decoder.isa b/arch/mips/isa/decoder.isa index ac97241ed..93e7238f8 100644 --- a/arch/mips/isa/decoder.isa +++ b/arch/mips/isa/decoder.isa @@ -30,11 +30,17 @@ decode OPCODE_HI default Unknown::unknown() { //Table A-3 Note: "1. Specific encodings of the rt, rd, and sa fields //are used to distinguish among the SLL, NOP, SSNOP and EHB functions." - 0x0: decode RS { - 0x0: sll({{ Rd = Rt.uw << SA; }}); - //0x0:nop({{ ; }}); //really sll r0,r0,0 - // 0x1:ssnop({{ ; }});//really sll r0,r0,1 - // 0x3:ehb({{ ; }}); //really sll r0,r0,3 + 0x0: decode RS { + 0x0: decode RT { + 0x0: decode RD default Nop::nop() { + 0x0: decode SA { + 0x1: ssnop({{ ; }}); //really sll r0,r0,1 + 0x3: ehb({{ ; }}); //really sll r0,r0,3 + } + } + } + + default: sll({{ Rd = Rt.uw << SA; }}); } 0x2: decode SRL { |